Lutetium gallium garnet (Lu3Ga5O12): A potential material for supercapacitor and pesticide detection applications

Rare earth gallium garnets possess numerous applications due to their excellent physical and chemical properties. The bifunctional applications from Lu3Ga5O12 can indeed open a new era for gallium garnets. The electrochemical storage devices and electrochemical detection of pesticides using Lu3Ga5O12 offer a unique perspective to the other nanocomposites. Herein, Lu3Ga5O12 was synthesized via a simple citrate gel-matrix method. Analytical techniques such as XRD, Raman, UV-Vis Spectroscopy, FE-SEM, XPS and BET examined the phase purity, crystallinity, optical properties, surface morphology, oxidation state, pore size etc. Electrochemical measurements, including CV, GCD, and EIS, validate that the as-prepared Lu3Ga5O12 exhibits a remarkable specific capacitance of about 658 Fg- 1 at 1 Ag-1. It also provides a higher capacitive retention rate of 88.41% for 5000 cycles at 5 Ag-1. It is then employed to fabricate an asymmetric device for its practical applications and exhibits a capacitive retention rate of about 74.88% and 95.02% of coulombic efficiency for 5000 cycles at 4 Ag-1. A simple, biocompatible sensing platform for the detection of imidacloprid was proposed. It establishes a linear relationship between sensing current and concentration from DPV with imidacloprid concentration ranging from 0.1 to 26 nM. The LOD obtained is 0.3 nM, thus enabling as a suitable sensor for practical accessibility.